Abstract
Photoexcited quasiparticle relaxation dynamics in overdoped (, hole doping ) single crystal is investigated as a function of temperature. We provide evidence of a pseudogap at this doping level. Moreover, this pseudogap vanishes at . Our data support the scenario where both the superconducting gap and pseudogap coexist in the superconducting state. Our results also suggest an increased scattering rate between electrons and spin fluctuations as the sample enters the pseudogap phase.
- Received 15 September 2010
DOI:https://doi.org/10.1103/PhysRevB.82.212503
©2010 American Physical Society